The average American in 2008 wasn't setting fire to courthouses. Let's not pretend that far-left extremism is something other than what it actually is.
My mother believed for the majority of her adult life that “semi-automatic” meant “fully automatic”, as in “squeeze once, all the bullets come out”. It’s incredible that people with little to no knowledge of the mechanics of guns want to regulate exactly that.
That is classic, soviet-style whataboutism. Yes, there are some left-wing extremists who have committed terrorist acts in recent years, but no, it is not the same as right-wing extremism. There are no left-wing militias running drills and planning to kidnap governors. Right-wing extremists exist in greater numbers, are more organized, and have been responsible for more violence in recent years than left-wing extremists.